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  • Title: Genetic polymorphisms of the DNA repair gene and risk of nasopharyngeal carcinoma.
    Author: Yang ZH, Du B, Wei YS, Zhang JH, Zhou B, Liang WB, Jia J, Zhang BL, Zhang L.
    Journal: DNA Cell Biol; 2007 Jul; 26(7):491-6. PubMed ID: 17630853.
    Abstract:
    CONTEXT: X-ray repair cross-complementing groups 1 and 3 (XRCC1 and XRCC3) and xeroderma pigmentosum group D (XPD) are mainly involved in base excision repair, homologous recombination repair, and nucleotide excision repair of DNA repair pathways, respectively. Previous studies have demonstrated that their gene polymorphisms were associated with some cancer susceptibility. OBJECTIVE AND DESIGN: To investigate the effect of XPD Lys751Gln, XRCC1 Arg399Gln, Arg194Trp, Arg280His, and XRCC3 Thr241Met polymorphisms on the risk of nasopharyngeal carcinoma (NPC), a population-based case-control study of 153 NPC patients and 168 healthy controls among Sichuan population was conducted. RESULTS: Our results showed that XRCC1 codon 194 Trp allele was associated with an increased risk of NPC (odds ratio [OR] = 1.828, 95% confidence interval [CI]: 1.286-2.598), and XPD codon 751Gln allele was associated with a borderline decrease of NPC (OR = 0.600, 95% CI: 0.361-1.000); combination analysis showed that individuals with both putative genotypes of XPD codon 751 Lys/Lys and XRCC1 codon 194 Arg/Trp or Trp/Trp have a significantly elevated risk of NPC (OR = 2.708, 95% CI: 1.338-5.478). CONCLUSION: The results indicated that XRCC1 codon 194 Trp allele and XPD codon 751 Lys allele may be contributing factors in the risk of NPC.
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